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Otto Lilienthal , Otto Lilienthal
With the design and construction of his first working glider, Otto Lilienthal (1848-1896) bestowed a sense of viability and respectab… Stair , stair. Series of treads and risers, the two making a step, in a flight of stairs, usually enclosed in a structure or cage (staircase), providing acce… Glider , glider, type of aircraft resembling an airplane but having at most a small auxiliary propulsion plant and usually no means of propulsion at all. The… Alan Bartlett Shepard Jr , (b. 18 November 1923 in East Derry, New Hampshire; d. 21 July 1998 in Monterey, California), U.S. Navy test pilot, astronaut, and businessman who in… Volley , vol·ley / ˈvälē/ • n. (pl. -leys) 1. a number of bullets, arrows, or other projectiles discharged at one time: the infantry let off a couple of volle… Gemini , Gemini
The Gemini program was the United States' second human spaceflight program, an interim step designed to bridge the technological gulf between…
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